[sat-e-390] Provide informative message on Content -> Subscriptions page when in Simple Content Access
- Banner should be consistent with Content Host details ie 'This organization has Simple Content Access. Access to repositories is unrestricted.'
- Perhaps add similar text to 'Manage Manifest' modal 'Simple Content Access: yes/no'
when Simple Content Access is enabled
Add simple_content_access key to org API endpoint
Add organization selector to consume in Redux
Add info bar to Subscriptions table
Add info to ManageManifestModal
Improve styling of ManageManifestModal
Use new method name simple_content_access?